Charles a



(No Model.)

O. A. HATCH. HIGH AND LOW WATER ALARM.

Patented Sept. 1,1891.

WITNESSES:

INVENTOR fl Awz9 QQW ATTORNEYS.

UNITED STATES PATENT OFFICE.

CHARLES A. HATCH, OF ONEIDA, NEW YORK, ASSIGNOR OF TlVO-THIRDS TO EDXVARD F. I-IASKELL AND HARRISON lV. COLEY, OF SAME PLACE.

HIGH AND LOW WATER ALARM.

SPECIFICATION forming part of Letters Patent No. 458,787, dated September 1, 1891.

Application filed July 16,-1891. Serial No. 399,691. (No model.)

To all whom it may concern/.-

Be it known that I, OHAELEs A. HATCH, of Oneida, in the county of Madison, in the State of New York, have invented new and useful Improvementsin High and Low ater Alarm for Steam -Boi1ers, of which the-following, taken in connection with .the accompanying drawings, is a full, clear, and exact descripion.

This invention pertains to the class of high and low water alarms in which a cylindrical case is connected in an upright position to the exterior of the boiler at the steam and water spaces thereof by tubes affording free communication between the interior of said case and interior of the boiler, and a float and levers in said case control the valve of the alarm-whistle connected to the case.

The object of my present invention is to provide a high and low water alarm which shall be simpler and cheaper in construction and more efficient and reliable in its operation; and to that end the invention consists in the improved construction and combination of parts hereinafter described, and specifically set forth in the claims.

In the annexed drawings, Figures 1 and 2 represents vertical longitudinal sections of a high and low water alarm embodying my invention and showingits condition at different stages of its operation.

C denotes the cylindrical case, which is secured vertically to the exterior of the boiler by pipes or thimbles d cl, connected to the upper and lower ends of the case in the usual manner.

D represents a steam-whistle of any wellknown form, attached. to the top of the case C by means of a vertical screw-threaded tube '6, which extends above and below the topplate or cap C of the case and has screwed onto its upper end the aforesaid whistle.

The lower or inner end of the tube terminates with a head or stop 25 and horizontal limb t, to the free end of which is pivoted the three-armed or inverted-T-shaped lever Z, the pivot being at the junction of the arms of said lever, and to the free end of the upwardly-extending central arm of said lever is connected the valve act the whistle. Said valve may be of any suitable and wellknown form, but preferably of the form of a plain stem having a tapering or conical end entering a similar conical port in the side of the tube 25, through which port passes the steam from the case C to the whistle to sound the same when said valve is opened. The other two arms or main portion of the lever Z extends across the case C and has one end under the stop t to come in contact therewith, 6c and thereby arrest the farther movement of the lever after the valve to has been opened sufficiently to sound the alarm-whistle, as illustrated in Fig. 2 of the drawings. To said end of the lever Z is secured a pendent stiff wire 0, to the lower end of which is attached in a horizontal position a ringc or other suitable open-work diaphragm. From the opposite end of the main portion of the lover I is suspended the float b by means of a light chain or other suitable flexible connection I).

v The float l) is heavier than the ring 0 and wire 0, and the wire 0' and flexible connection Z) are of such lengths as to cause the lever Z to be tilted to open the valve or by the weight of the float 1) drawing down the chain or cord 11' when the float has descended in the case to a point on a level with the low-water line of the boiler, and in rising with the water to the high-water line the float Z) comes So in contact with the ring 0 and pushes the same upward together with its wire connection 0 to the lever Z; The float and ring being connected to opposite ends of the aforesaid lever causes the latter to be tilted in one 8 5 and the same direction by the aforesaid risin g and falling of the float to the extreme wator-lines in the case C, and thus the valve to, which is connected to said lever, is opened and the alarm\vhistle sounded by means of the single lever, as represented in Fig. 2 of the drawings. The ring 0 and its connection 0, with one end of the lever Z, are of sufficient weight to draw down said end of the lever and hold the valve aclosed when the float 9 5 b is between the two extreme water-levels of the case, as illustrated in Fig. 1 of the drawings.

Having described my invention, what I claim as new, and desire to secure by Letters ICO Patent, is

1. In a high and low water alarm for steamboilers, the combination, with the case 0 and whistle D, connected thereto, of the inverted T-shaped lever Z, the valve a, connected to the central arm ofsaid lever, the ring or diaphragm a, suspended from the other arm of said lever by the stiff wire 0, and the float b, suspended from the third arm of the lever by a flexible connection and ontweighing the aforesaid ring, as set forth.

2. In combination with the case 0, the tube 25, secured vertically in the top plate of said case and extending above and below said plate and terminating at its lower end with the stop 25 and horizontal limb t, the whistle D, secured to the outer end of said tube, the inverted-T-shaped lever Z, pivoted at the junction of its arms to the free end of the aforesaid limb and extending with its main por tion across the case and under the stop t, the valve a, connected to the u wardly-extending central arm of said lever,- t e stiff wire a, suspended from one end of the main portion of the lever, the ring 0, secured horizontally to the lower end of said wire, and the float b, suspended by a flexible connection fromthe opposite end of the main portion of the lever and outweighing the aforesaid ring and wire, substantially as described and shown.

In testimony whereof I have hereunto signed my name this 23d day of June, 1891.

CHARLES A. HATCH. [L. s.] Witnesses:

FREDK. BUSH, WALTER O. FAXON. 

